Best thing I have found in a non-systethic oil is Pennzoil 25-50 Nitro blend, is made for alcohol/nitro use, seems to hold up better than anything else in a conventional oil with alcohol. I can get up to 40 runs on a change and it still looks good on the way out, and does not "milk-up" bad like most others do. This is different than the 20/50 blend they sell, costs about $4 a qt. When I ran junior dragsters best thing out there was Royal Purple 11.
Just my 2 cents worth.